Patents by Inventor Masaki Koizumi

Masaki Koizumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10927453
    Abstract: A TiN-based film includes TiON films having an oxygen content of 50% or above and TiN films which are laminated alternately on a substrate. In a TiN-based film forming method, a TiON film having an oxygen content of 50 at % or above and a TiN film are alternately formed on a substrate.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: February 23, 2021
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Tadahiro Ishizaka, Masaki Koizumi, Masaki Sano, Seokhyoung Hong
  • Patent number: 10529598
    Abstract: A microwave heat treatment apparatus includes: a processing vessel configured to accommodate a substrate therein; a support member configured to rotatably support the substrate in the processing vessel; a microwave introduction device configured to generate a microwave for processing the substrate and introduce the microwave into the processing vessel; a first cooling gas introduction part installed to face a main surface of the substrate supported by the support member, the main surface being a target to be processed; a second cooling gas introduction part installed in a lateral side of the substrate supported by the support member; and a control unit configured to independently control the introduction of a cooling gas from the first cooling gas introduction part and the introduction of the cooling gas from the second cooling gas introduction part.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 7, 2020
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Seokhyoung Hong, Taichi Monden, Yoshihiro Miyagawa, Masaki Koizumi
  • Patent number: 10483100
    Abstract: A TiON film forming method is provided. A cycle of forming a unit TiN film at a predetermined processing temperature by alternately supplying a Ti-containing gas and a nitriding gas into the processing chamber accommodating a target substrate and oxidizing the unit TiN film by supplying an oxidizing agent into the processing chamber is repeated multiple times. In an initial stage of the film formation, a cycle of repeating the alternate supply of the Ti-containing gas and the nitriding gas X1 times and supplying the oxidizing agent is repeated Y1 times. In a later stage of the film formation, a cycle of repeating the alternate supply of the Ti-containing gas and the nitriding gas X2 times and supplying the oxidizing agent is repeated Y2 times until a desired film thickness is obtained. The number of repetition X1 is set to be greater than the number of repetition X2.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: November 19, 2019
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Tadahiro Ishizaka, Masaki Koizumi, Masaki Sano, Seokhyoung Hong
  • Patent number: 10199451
    Abstract: A lower electrode is made of a TiN-based material and provided at a base of a dielectric film in a DRAM capacitor. The lower electrode includes first TiON films provided at opposite outer sides, the first TiON films having a relatively low oxygen concentration, and a second TiON film provided between the first TiON films, the second TiON film having a relatively high oxygen concentration.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: February 5, 2019
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Tadahiro Ishizaka, Masaki Koizumi, Masaki Sano, Seokhyoung Hong
  • Publication number: 20180135169
    Abstract: A TiN-based film includes TiON films having an oxygen content of 50% or above and TiN films which are laminated alternately on a substrate. In a TiN-based film forming method, a TiON film having an oxygen content of 50 at % or above and a TiN film are alternately formed on a substrate.
    Type: Application
    Filed: November 14, 2017
    Publication date: May 17, 2018
    Inventors: Tadahiro ISHIZAKA, Masaki KOIZUMI, Masaki SANO, Seokhyoung HONG
  • Publication number: 20170179219
    Abstract: A lower electrode is made of a TiN-based material and provided at a base of a dielectric film in a DRAM capacitor. The lower electrode includes first TiON films provided at opposite outer sides, the first TiON films having a relatively low oxygen concentration, and a second TiON film provided between the first TiON films, the second TiON film having a relatively high oxygen concentration.
    Type: Application
    Filed: December 21, 2016
    Publication date: June 22, 2017
    Inventors: Tadahiro ISHIZAKA, Masaki KOIZUMI, Masaki SANO, Seokhyoung HONG
  • Publication number: 20170092489
    Abstract: A TiON film forming method is provided. A cycle of forming a unit TiN film at a predetermined processing temperature by alternately supplying a Ti-containing gas and a nitriding gas into the processing chamber accommodating a target substrate and oxidizing the unit TiN film by supplying an oxidizing agent into the processing chamber is repeated multiple times. In an initial stage of the film formation, a cycle of repeating the alternate supply of the Ti-containing gas and the nitriding gas X1 times and supplying the oxidizing agent is repeated Y1 times. In a later stage of the film formation, a cycle of repeating the alternate supply of the Ti-containing gas and the nitriding gas X2 times and supplying the oxidizing agent is repeated Y2 times until a desired film thickness is obtained. The number of repetition X1 is set to be greater than the number of repetition X2.
    Type: Application
    Filed: September 22, 2016
    Publication date: March 30, 2017
    Inventors: Tadahiro ISHIZAKA, Masaki KOIZUMI, Masaki SANO, Seokhyoung HONG
  • Publication number: 20150144621
    Abstract: A matching method and a microwave heating method in a microwave heating apparatus for heating a substrate by introducing a microwave into a processing chamber comprises an initial matching step of performing a matching so that a reflection power to a microwave introducing unit is minimized in a state where the substrate is maintained at a first height position by a supporting member. And a second height position determination step of introducing the microwave into the processing chamber by the microwave introducing unit and determining a second height position of the substrate based on at least a temperature of the substrate while adjusting a height of the substrate by the supporting member.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 28, 2015
    Inventors: Seokhyoung HONG, Mitsutoshi ASHIDA, Yoshihiro MIYAGAWA, Masaki KOIZUMI
  • Publication number: 20150144622
    Abstract: A microwave heat treatment apparatus includes: a processing vessel configured to accommodate a substrate therein; a support member configured to rotatably support the substrate in the processing vessel; a microwave introduction device configured to generate a microwave for processing the substrate and introduce the microwave into the processing vessel; a first cooling gas introduction part installed to face a main surface of the substrate supported by the support member, the main surface being a target to be processed; a second cooling gas introduction part installed in a lateral side of the substrate supported by the support member; and a control unit configured to independently control the introduction of a cooling gas from the first cooling gas introduction part and the introduction of the cooling gas from the second cooling gas introduction part.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 28, 2015
    Inventors: Seokhyoung HONG, Taichi MONDEN, Yoshihiro MIYAGAWA, Masaki KOIZUMI
  • Publication number: 20140174609
    Abstract: A method for manufacturing a high-strength steel sheet for a can, including (a) hot rolling a steel slab at a slab extraction temperature of 1200° C. or more and a finish rolling temperature of (Ar3 transformation temperature?30)° C. or more, the steel slab containing, on the basis of mass percent, more than 0.02%, but 0.10% or less of C, 0.10% or less of Si, 1.5% or less of Mn, 0.20% or less of P, 0.20% or less of S, 0.10% or less of Al, 0.0120% to 0.0250% of N, and the balance being Fe and incidental impurities; (b) coiling at a temperature of 650° C. or less; (c) pickling; (d) carrying out a first cold rolling; (e) continuously annealing; and (f) carrying out a second cold rolling at a reduction ratio of 10% or more and less than 20%.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: JFE Steel Corporation
    Inventors: Makoto ARATANI, Toshikatsu KATO, Katsuhito KAWAMURA, Takumi TANAKA, Katsumi KOJIMA, Kaku SATO, Shigeko SUJITA, Masaki KOIZUMI
  • Patent number: 8021717
    Abstract: A treatment gas is supplied to form a Ti-based film on a predetermined number of wafers W while setting a temperature of a susceptor 2 in a chamber 1 to a predetermined temperature. After this, the interior of the chamber 1 containing no wafers W is cleaned by discharging Cl2 gas as a cleaning gas from a shower head 10 into the chamber 1. During this cleaning, the temperature of each of the susceptor 2, the shower head 10, and the wall portion of the chamber 1 is independently controlled so that the temperature of the susceptor 2 is not lower than the decomposition start temperature of Cl2 gas and the temperature of the shower head 10 and the wall portion of the chamber 1 is not higher than the decomposition start temperature.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: September 20, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Seishi Murakami, Masaki Koizumi, Hiroaki Ashizawa, Masato Koizumi
  • Publication number: 20110076177
    Abstract: A steel sheet for cans that has a yield stress of at least 500 Mpa after coating and baking and a method for manufacturing the steel sheet for cans are provided. The steel sheet for cans contains, on the basis of mass percent, C: more than 0.02% but 0.10% or less, Si: 0.10% or less, Mn: 1.5% or less, P: 0.20% or less, S: 0.20% or less, Al: 0.10% or less, N: 0.0120% to 0.0250%, dissolved N being 0.0100% or more, and a remainder of Fe and incidental impurities. A high-strength material can be obtained by maintaining the absolute quantity of dissolved N at a certain value or more and performing hardening by quench aging and strain aging, for example, in a printing process, a film lamination process, or a drying and baking process performed before can manufacturing. In the manufacture, hot rolling is performed at a slab extraction temperature of 1200° C. or more and a finish rolling temperature of (Ar3 transformation temperature—30)° C. or more, and coiling is performed at 650° C. or less.
    Type: Application
    Filed: April 1, 2009
    Publication date: March 31, 2011
    Applicant: JFE STEEL CORPORATION
    Inventors: Makoto Aratani, Toshikatsu Kato, Katsuhito Kawamura, Takumi Tanaka, Katsumi Kojima, Kaku Sato, Shigeko Sujita, Masaki Koizumi
  • Publication number: 20090142513
    Abstract: A treatment gas is supplied to form a Ti-based film on a predetermined number of wafers W while setting a temperature of a susceptor 2 in a chamber 1 to a predetermined temperature. After this, the interior of the chamber 1 containing no wafers W is cleaned by discharging Cl2 gas as a cleaning gas from a shower head 10 into the chamber 1. During this cleaning, the temperature of each of the susceptor 2, the shower head 10, and the wall portion of the chamber 1 is independently controlled so that the temperature of the susceptor 2 is not lower than the decomposition start temperature of Cl2 gas and the temperature of the shower head 10 and the wall portion of the chamber 1 is not higher than the decomposition start temperature.
    Type: Application
    Filed: January 12, 2009
    Publication date: June 4, 2009
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Seishi MURAKAMI, Masaki Koizumi, Hiroaki Ashizawa, Masato Koizumi